Respiratory hood



Oct. 3, 1933. A. BELLONI RESPIRATORY HOOD Filed May 15, 1951 *7 INVENTOR W Angelo Belloni I .2 This is obtained by fastening the helmet so that air causes the flexible shroud to adhere to the 1 is not a dangerous atmosphere. pipes (6).

Patented Oct. 3,1933 y r i v v A [TED n Angelo Belloni. ,Portovenera; Italy H Application May 15, 1931,"emanate-tees,

' e and in Italy May 16,1930

2 Claims. (01. 123-441 The present invention relates to a protecting The gas-mask according to the present inven helmet'which may be used for breathing in an tion, presentsthe following advantage overthose' atmosphere impregnated with ,asphyxiating usedheretofore: if the check-valve sticks or begases', this object being obtained with very comes inoperative, the asphyxiating gases do not 5 simple and inexpensive means, which, however, come in contact with the mucous -membranes-o'f 6,0

afford the complete protection obtained even the nose or of themouth. l J against the most penetrating gases. A- failure as above, with ordinary gas-'masks,

The construction of my'new helmet is such that is detected only. by the smell, by'the taste or by the head of the wearer and his shoulders, down the vesicating action of the poison gas coming in 19 to the arm pits, are covered with a shroud, which direct touch with the nose or mouth. Butat-such 65 is fastened to the body. The drawing in of the a moment it-is generally too late to look at the fresh air to be inhaled can be accomplished in valve and remedy its failure by hand, because the any known manner and the exhaled air is carpoison gas has already damaged vital organs. ried away by a closed pipe provided with a water- With the gas-mask, constructed in accordance seal or check valve, g with my invention, an accident inits operation Ill.

The object of the present invention is'a parresults at first in an inhalation of the air conticular embodiment of the helmetspecified above, tained within the helmet. This air, though it is which may allow it to be used for breathing in foul air, is not, poisoned, so it cannot injure enclosed places filled with asphyxiating gases. nternal organs. p More v s at on of it is not entirely air-tight around the neck, by head of the wearer and to expand and contract means of a collar or strap and by the combina-, withthe respira y rhythm of the wearer This tion of the helmet with one of a known type of calls attention to the accidentand the wearer device (gas-mask) which allows breathing in incan easily take steps to place the valve in opera- 5' fected air. These latter devices usually consist of tionagain. For very irritating gases a headso a filter, an inlet valve, an outlet valve and a cover is generally used in addition to the gasmouth-piece, said combination being such as to mask; this'is not necessary with the present inallow the expired air to be breathed out into the Ve tion as t shroud is permanently p ace. f space within the helmet. According to the noxiousness of the poison gas The filter of said apparatus is arranged outside it is possible to y within Ce ta n i s e 85.

of the helmet, either at the waist-band orin any pressure Within the heed-shroud, y tightening other suitable position, while the expiration valve loosening eck collar Without forming an is placed within the helmet or, when no valve is tight seal at h p nt. used, the expiration occurs within the helmet. As the nose of the wearer is ot in a poisoned 351 1 1 x i air goes t t t atmosphere atmosphere and a possible inhalation through 99 through the space resulting from the looseness the nose is not dangerous, i is not ecessa y to. i of closure of the helmet around the neck of the 7 pinch the nose. which removes one of e. causes. beaten I of the unpopularity of the ordinary gas-mask.

In my invention the respiratory helmet, instead The gas" nlask according to t present inven- 40 of operating as an helmet, operates substantially tlon 0601113185 mile space nd is inexpensive to 9,5,

as a gas-mask. In fact while in the respiratory construct I j helmet the air to be breathed circulates in a In the a mp ny d awi g are shown two closed cycle, in the case of the gas-maslgaccorde m o e of iJhe pr nvention which are ing to the present invention, the air which is to given p e y s eXemples. Of y ve t on! be breathed is drawn directly into the mouth, 1 Shows a eada with a Whiskers-band 1. 9 after removal of the poison gases by an efiective and filter positioned high near mouth a filtration; When it is exhaled within the shroud 2 shOWs another h gear W meuthepieee or helmet, it re-enters the atmosphere through and filter fiXed on the Chest of the p t the incomplete closure around the neck-band. Both devices are provided with an expiratory Due to the resistance offered to the escape of said valve. m5

expired air, a certain pressure builds up within In the figures shown (1) is the head-shroud, the shroud, thereby preventing the entrance of (2) the filter, (3) the inspiration valve, (4) the poisoned gas into the same, though maintaining expiration valve and (5) the collar strap, cord, in the shroud a fouled atmosphere but one which or rope, the parts being connected by rubber sif- The admission of air to the mouth is regulated either by a whisker-band (9) or by a mouth piece (10).

The apparatus operates as follows:

The poisoned air enters, as shown by the arshroud formed by a suitable .loosenesslinthe closure means 5. This maybetermed an imperfect closure. i

The resistance which this imperfect closure offers to the escapeo'f the expired air can be ening or releasing of collar or strap '5. The means by which the strap or collar 5 may be tightened or loosened to regulate the amount of closure betweenthe shroudand the neck of the wearer is'well known. This particular means .of adjustment forms no parttof .myinvention;

, It is to be-understood that any modification of m disclosed. device consistent with thenovel invention herein disclosedmay bepemployed. The scope of my invention is not to be determined by any description set forth in this specification, but is to be regulated solely by the scope of the appended claims.

*What I claim is: V

1. A respiratory head-gear for enabling the wearer to breathe in an atmosphere containing poisonous gases, comprising a cowl member enclosing the entirehead of the wearer, means positioned adjacent the wearers neck for securing the head gear in such a manner that the cowl is not completely air-tight, a filter member positioned exterior to said head gear through which the air used for inspiration is inhaled, a

in-saidcowl member, and then passing to the external atmosphere through the non-complete I H closure of the cowl around the wearers neck. adjusted in a very simple way by apropertight- 2; "A respiratory head-gear as claimed in claim 1', including-a check valve'positioned within said head gear; meansior conducting exhaled airfrom therespiratory organ of thewearer tosaid check valve, the exhaled air escaping into the space within said cowl member after having passed through said check valve, and then pass-. ing to the external atmosphere through the non- 

